import numpy as np
def RMSE(pred,actul):
    '''
    函数名称：均方根误差计算
    :param pred: 预测值
    :param actul: 真实值
    :return: 均方根误差
    '''
    loss=np.power(np.sum(np.power(pred-actul,2))/pred.shape[0],0.5)
    return loss